In a grails gsp template, how can I use a server side comment without sitemesh throwing an error?

Question

When I use a standard jsp comment block in a gsp template

<%-- some server-side comment --%>

, sitemesh throws an 'unexpected token' error. Is there another comment syntax I can use?

To clarify, the <%-- syntax works in a gsp but not in a gsp template being included with — gabe, Jul 08 '11 at 04:31

score 26 · Answer 1 · answered Jul 07 '11 at 08:33

26

The following works for me

%{-- <div>hello</div> --}%

answered Jul 07 '11 at 08:33

Dónal

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score 19 · Answer 2 · answered Jul 07 '11 at 10:01

19

You are missing a '%' sign. Write it as :

<%-- some server-side comment --%>

answered Jul 07 '11 at 10:01

MAlex

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Thanks. Typo was just in the question, not the code, question fixed. – gabe Jul 08 '11 at 04:29

Smithfield · Answer 3 · 2017-08-12T02:32:42.147

There's a little confusion among previous answers (and the question itself) that I wish was explained to me at first. There are a few types of server side comments on a .gsp. So within the .gsp document Server side comments go as follow:

<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head></head>
<body>
    <!-- the basic HTML comment (not on server side) -->
    <h1>Visible on client side</h1>

    <%-- GSP common comment (server side only) --%>
    %{-- GSP alternative approach (again, on server side only) --}%
    <g:if test="${true}">
        <h1>Invisible on client side, just in source code</h1>
    </g:if>

    <p>and the one asked for happens elsewhere, 
    whenever you write classic Groovy script</p>
    <g:set var="myTitle"/>
    <%
        myVar = 'comment'
        if(myVar.equals('comment')){
            /*Needs the classic Java comment, 
            this happens whether you're writing a simple .gsp 
            or any _template.gsp*/
            myTitle = "<h1>Visible on server side only</h1>".encodeAsRaw()
        }
    %>
    ${myTitle}

    <p>.gsp template does not modify comment behaviour</p>
    <g:render template="/templates/myTemplate" model="[:]"/>
</body>
</html>

file: _myTemplate.gsp

<h2>Template</h2>

<!-- visible -->
<% invisible %>
%{-- invisible --}%
<% /*invisible*/ %>

(Grails 2.5.5)

score 5 · Answer 4 · answered Aug 17 '11 at 23:24

The original question was asking how to comment out anything in the GSP file. The only one that worked for me is

<%-- some code to comment out --%>,

the other answers won't work especially if the code being commented are grails tags. %{ and <% didn't work.

score 4 · Accepted Answer · answered Jul 06 '11 at 18:24

4

A regular java comment block will work

<% /*  some server side comment */ %>

answered Jul 06 '11 at 18:24

gabe

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2

its not good approach in gsp pages. use %{-- --}% that is truly created for gsp pages – Muhammad Aamir Talib Jul 08 '14 at 11:32

score 0 · Answer 6 · answered May 30 '15 at 11:42

if you are writing a gsp that wants to display a uninterpreted grails g: tag, e.g. you want <g:link ... to appear as-is on the page, without being interpreted server-side, the following worked nicely for me.

In both the start and end tags, replace the < with <

e.g.

<g:link...>...</g:link> gets interpreted server-side and shows up in the page a link.

<g:link ...>...</g:link ...> shows up in the front-end page as <g:link...>...</g:link>

score 0 · Answer 7 · edited Dec 26 '16 at 03:27

0

<%-- server side code --%> should work

edited Dec 26 '16 at 03:27

Tushar

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answered Dec 25 '16 at 20:32

Tony

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In a grails gsp template, how can I use a server side comment without sitemesh throwing an error?

7 Answers7